Observation device and observation system

Abstract

The utility model provides an observation device and an observation system, and belongs to the technical field of batteries. An observation device for a battery comprises a shell used for containing the battery, an observation window is formed in the top wall of the shell and used for observing the state of the battery, and a first through hole and a second through hole are formed in the shell; an introduction member that introduces the first object into the housing through the first through-hole; and a leading-out member leading out the second object from the inside of the housing via the second through hole.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an observation device and an observation system. Background Art

[0002] During the process of charging and discharging, the side reactions between the electrodes and the electrolyte produce various gases along with organic and inorganic salts. The generation of these gases is detrimental to lithium batteries, affecting the safety performance of the batteries and causing the performance of the batteries to deteriorate.

[0003] At present, the electrochemical cell with controlled surface (ECCS) technology has been used to observe the electrochemical changes of the electrode during the charging and discharging process of lithium batteries in situ, such as gas production or site, lithium precipitation, expansion or contraction, etc. However, ECCS technology lacks qualitative or quantitative characterization of the chemical composition of the interface, such as gas production gas composition, electrolyte composition changes, etc. How to solve the problem of online observation of the changes in the internal reaction of the battery during the charging and discharging process, while monitoring the changes in gas production and electrolyte composition, there is still a lack of corresponding technical means and equipment. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide an observation device to improve, alleviate or solve the problem that it is impossible to monitor the gas production or electrolyte composition changes while online observing the changes in the internal reaction of the battery during the battery charging and discharging process.

[0005] An embodiment of the first aspect of the present application provides an observation device for a battery, comprising: a shell for accommodating the battery, the top wall of the shell being provided with an observation window for observing the state of the battery, and the shell being provided with a first through hole and a second through hole; an introduction component, the introduction component introducing a first object into the interior of the shell via the first through hole; and an export component, the export component exporting a second object from the interior of the shell via the second through hole.

[0006] In the technical solution of the embodiment of the present application, a through hole is provided on the shell of the observation device of the battery and an introduction member and an outlet member are connected, so that the gas product or electrolyte change of the battery during the charging and discharging process can be exported through the outlet member, thereby facilitating rapid qualitative and quantitative detection of the gas product or electrolyte component changes while intuitively observing the changes in the internal reaction of the battery.

[0007] In some embodiments, the component to be detected of the battery is a gas product generated during the charging and discharging process of the battery, the introduction member and the outlet member include a gas conduit, the first object includes an inert gas, and the second object includes a gas product. When the battery generates a gas product, the gas conduit can realize the outlet of the gas product from the observation device, wherein the inert gas is filled into the observation device through the introduction member, which can reduce the concentration of oxygen and water, reduce the impact on the detection, and outlet the original gas inside the gas containing space in the observation device and outlet the gas product generated by the battery.

[0008] In some embodiments, the introduction member and the outlet member extend into the outer shell of the battery, or the introduction member and the outlet member extend into the shell and do not extend into the outer shell of the battery. When the gas product of the battery overflows from the inside of the battery into the gas containing space of the observation device, the introduction member and the outlet member do not need to be deeply inserted into the outer shell of the battery, so that the connection does not need to be sealed and non-destructive detection can be achieved.

[0009] In some embodiments, the introduction member and the outlet member extend into the battery housing, and the connection with the battery housing is sealed by heat compression. The heat compression sealing method can prevent the gas product of the battery from overflowing from the connection between the battery housing and the introduction and outlet members, thereby ensuring the accuracy of the detection result.

[0010] In some embodiments, the component to be detected in the battery is the electrolyte in the battery cell, the introduction member and the output member include optical fibers, and the first object and the second object include optical signals. By combining the optical fiber with the housing of the observation device, rapid qualitative and quantitative detection of changes in electrolyte components during battery charging and discharging can be achieved.

[0011] In some embodiments, the introduction member and the output member are connected to each other in the battery cell of the battery. By connecting the optical fibers of the introduction member and the output member to each other in the battery cell of the battery, the normal interaction between the electrolyte and the spectral optical fiber is ensured, thereby ensuring the signal transmission efficiency.

[0012] In some embodiments, the observation device further includes an optical fiber sensor, which is immersed in the electrolyte in the battery core, and the introduction member and the export member are connected via the optical fiber sensor. By immersing the optical fiber sensor in the electrolyte of the battery, sufficient interaction between the electrolyte and the sensor is ensured, so that the optical fiber sensor can capture the light signal scattered by the electrolyte, thereby providing it to the downstream data acquisition, spectrum generation and analysis software.

[0013] In some embodiments, the surface of the optical fiber is coated with a polymer coating, and the connection between the optical fiber and the battery housing is sealed by heat pressing. The heat pressing sealing method can prevent the electrolyte from overflowing from the connection between the optical fiber and the battery housing, thereby ensuring the accuracy of the detection result.

[0014] In some embodiments, the first through hole and the second through hole are provided with internal threads, and the introduction member and the export member are respectively threadedly connected to the first through hole and the second through hole. By providing the first through hole and the second through hole with internal threads so that the introduction member and the export member are threadedly connected thereto, the reliability and safety of the system can be increased, and the connection and disassembly of the observation device can be simple and convenient, thereby improving the maintainability of the system. In addition, the threaded connection method can also reduce the space occupied.

[0015] In some embodiments, a seal is provided at the connection between the inlet and outlet components and the housing, and a locking member is provided through the seal to fix the seal. The seal effectively prevents leakage of liquid, gas and other media, maintains the sealing performance of the observation device, and the locking member is provided to ensure a stable connection and prevent loosening.

[0016] In some embodiments, the housing includes: an upper housing, on which the observation window is disposed; and a lower housing, on which the first through hole and the second through hole are disposed. By configuring the housing as an upper housing and a lower housing, it is more convenient to maintain and replace, and the stability of the overall structure is improved, thereby improving the convenience of designing and using the observation device.

[0017] The second aspect of the present application provides an observation system for a battery, which includes the observation device in the above embodiment. Such an observation system can provide the advantages described above for the observation device, which will not be described in detail for the sake of brevity.

[0018] In some embodiments, the observation system further includes: a box body, which has an internal cavity and accommodates the observation device; a display system, which is arranged above the observation window and is used to display the state of the battery through the observation window; a battery testing system, which is respectively connected to the positive and negative electrodes of the battery and is used to control the working process of the battery; an import system, which is used to import a first object into the observation device; and a detection system, which is used to receive a second object derived from the observation device and detect the second object. By combining the observation device of the embodiment of the present disclosure with an external display device and a detection device, it is possible to realize online detection of gas products or electrolyte components while observing the in-situ reaction of the battery, and at the same time, the working process of the battery can be controlled, thereby obtaining a quantitative and qualitative relationship between the change of the gas product or electrolyte and the battery working variable.

[0019] In some embodiments, the component to be detected of the battery is a gas product generated by the battery during the charge and discharge process, the introduction system includes a gas carrier device and a flow meter, the introduction system is connected to the introduction component via a gas conduit joint, and the detection system includes a cold hydrazine, a filter and a mass spectrometer connected in series in the gas flow direction. Through the external gas carrier device and the flow meter, the flow rate of the introduced gas can be controlled, and the gas product can be exported to the downstream data acquisition, spectrum generation and analysis software for use.

[0020] In some embodiments, the component to be detected in the battery is the electrolyte in the battery cell, the introduction system includes a light exciter, and the detection system includes a light receiver and a computer. The light exciter excites the components in the electrolyte, the light receiver receives the reflected or transmitted light signal, and processes and analyzes it through the computer, thereby realizing real-time detection of the electrolyte components in the battery cell.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0023] Figure 1 It is a schematic diagram of the exploded structure of the housing of some embodiments of the present application;

[0024] Figure 2 A top view of a housing of some embodiments of the present application;

[0025] Figure 3 A schematic cross-sectional view of an observation device according to some embodiments of the present application;

[0026] Figure 4 A schematic cross-sectional view of an observation device according to some embodiments of the present application;

[0027] Figure 5 A schematic cross-sectional view of an observation device according to some embodiments of the present application;

[0028] Figure 6 A schematic diagram of the structure of an observation system in some embodiments of the present application;

[0029] Figure 7 This is a schematic diagram of the structure of an observation system according to some embodiments of the present application.

[0030] Description of reference numerals:

[0031] Observation device 100,

[0032] Shell 10, upper shell 11, observation window 112, lower shell 12, first through hole 121, second through hole 122,

[0033] Battery 20, positive electrode 221, negative electrode 222, housing 23,

[0034] Import component 30, export component 40,

[0035] Optical fiber sensor 50,

[0036] Sealing member 60, locking member 70,

[0037] Observation System 1000,

[0038] Box body 200, display system 300, battery testing system 400, introduction system 500, detection system 600;

[0039] Gas carrier device 501, flow meter 502, light exciter 503;

[0040] Cooling hydrazine 601, filter 602, mass spectrometer 603, light receiver 604, computer 605. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0043] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0048] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0050] During the charge and discharge process of the battery, various gases are generated due to the side reactions of the electrodes and electrolytes. However, existing technologies have limitations in monitoring the generation and consumption of these gases and changes in the composition of the electrolyte. The current technology can achieve in-situ characterization of the optical images of the changes in the internal reactions of lithium batteries by using the electrochemical reaction visualization confocal system (ECCS), and can observe in-situ the electrochemical changes of the pole pieces during the charge and discharge of lithium batteries (for example, expansion and contraction of active materials, uneven reaction distribution, lithium dendrites, etc.). The equipment uses white illumination with a xenon lamp as the light source and a 3CCD inspection device to form a high-contrast, high-quality color confocal image. Although ESSC technology realizes in-situ characterization of optical images, the qualitative or quantitative characterization of the chemical composition of the interface is not perfect. For example, there is still a lack of monitoring of gas-producing gas components, electrolyte components, etc. The in-situ electrochemical mass spectrometer (DEMS) currently used in the industry can monitor gas generation or consumption, or implant Raman optical fibers into the battery cell to monitor changes in electrolyte composition, but these methods only provide discrete point measurement results and cannot achieve real-time monitoring of changes in the entire battery's internal reactions and changes in gas / electrolyte composition. In view of the above problems, there is still a lack of a comprehensive monitoring technology and equipment that can detect internal reactions and changes in gas or electrolyte composition during the charging and discharging process of lithium batteries online. Therefore, it is necessary to provide a new device to address the limitations of the existing technology.

[0051] Based on the above considerations, in order to alleviate, mitigate or solve the problem in the related art that it is impossible to monitor the changes in the internal reaction of the battery online and the changes in the gas production and electrolyte components during the battery charging and discharging process, an observation device and corresponding observation equipment are involved, which allow real-time monitoring of the changes in the internal reaction of the battery and facilitate qualitative and quantitative analysis of the changes in the components of the gas products or the electrolyte.

[0052] The observation device or observation system disclosed in the embodiment of the present application can be used to observe the battery, and the battery can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. The observation device or observation system disclosed in the present application can be used, which is conducive to real-time observation of the electrochemical reaction process inside the battery, while allowing online visual monitoring and detection of gas products or electrolyte components.

[0053] See also Figures 1 to 3 , Figure 1 is a schematic diagram of the exploded structure of the housing of some embodiments of the present application, Figure 2 This is a top view of the housing of some embodiments of the present application. Figure 3Schematic cross-sectional view of observation devices of some embodiments of the present application. The present application embodiment provides an observation device 100 for a battery, comprising a housing 10, an introduction member 30, and an outlet member 40. The housing 10 is used to accommodate a battery 20, and an observation window 112 is provided on the top wall of the housing 10 for observing the state of the battery 20, and a first through hole 121 and a second through hole 122 are provided on the housing 10. The introduction member 30 introduces a first object into the interior of the housing 10 via the first through hole 121, and the outlet member 40 outlets a second object from the interior of the housing 10 via the second through hole 122.

[0054] In some embodiments, the housing 10 of the observation device may be an aluminum housing with a clamp inside for clamping and fixing the battery to be observed.

[0055] In this article, the term "observation window" refers to a visual window on the top wall of the observation device. Generally, a transparent window is provided by glass or other transparent polymer materials. In some embodiments, the size of the observation window can be designed according to experimental requirements and equipment. Generally, the observation window should have a sufficient area to observe changes on the surface of the battery. In addition, the observation window can be sealed with the upper wall of the housing to ensure the closedness and stability of the observation environment.

[0056] As used herein, the terms "introduction member" and "extraction member" refer to various members capable of introducing or extracting physical entities or electrical or optical signals, including but not limited to airway tubes, optical fibers, and the like.

[0057] By setting a through hole on the shell of the battery observation device and connecting the introduction component and the outlet component, the gas product or electrolyte change of the battery during the charging and discharging process can be exported through the outlet component, thereby facilitating rapid qualitative and quantitative detection of the gas product or electrolyte component changes while intuitively observing the changes in the internal reaction of the battery.

[0058] See also Figure 3 to Figure 4 , Figure 4 Schematic cross-sectional view of an observation device according to some embodiments of the present application.

[0059] According to some embodiments of the present application, the component to be detected of the battery 20 is a gas product generated during the charging and discharging process of the battery 20, the introduction component 30 and the outlet component 40 include a gas conduit, the first object includes an inert gas, and the second object includes a gas product.

[0060] In some embodiments, the gas conduit may be a polyetheretherketone (PEEK) conduit, which has excellent heat resistance, chemical corrosion resistance and mechanical properties.

[0061] In some embodiments, the inert gas may include nitrogen (N 2 ), argon (Ar) and / or helium (He). Inert gases have low thermal conductivity and can reduce heat loss during electrochemical reactions, making the experimental temperature more stable and controllable. At the same time, the introduction of inert gases can prevent interference from oxygen and moisture, which may react with the electrolyte or reaction products, causing interference or degradation of the analysis results.

[0062] When the battery produces gas products, the gas duct can be used to discharge the gas products from the observation device, wherein the inert gas is filled into the observation device through the introduction component, which can reduce the concentration of oxygen and moisture, reduce the impact on detection, and discharge the original gas inside the gas containing space in the observation device and the gas products generated by the battery.

[0063] According to some embodiments of the present application, the introduction member 30 and the outlet member 40 extend into the housing 23 of the battery 20 (eg, Figure 3 As shown), or the introduction member 30 and the outlet member 40 extend into the housing 10 and do not extend into the housing 23 of the battery 20 (as shown Figure 4 shown).

[0064] In some embodiments, the outer shell 23 of the battery 20 refers to a component used to cooperate with the end cap to form an internal environment of the battery cell, wherein the formed internal environment can be used to accommodate the battery cell assembly, electrolyte and other components. The outer shell 23 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the outer shell 23 can be determined according to the specific shape and size of the battery cell assembly. The material of the outer shell 23 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0065] When the gas product of the battery overflows from the inside of the battery into the gas containing space of the observation device, the introduction member and the discharge member do not need to penetrate into the battery casing, so that the connection does not need to be sealed and non-destructive testing can be achieved.

[0066] According to some embodiments of the present application, the introduction member 30 and the outlet member 40 extend into the outer shell 23 of the battery 20 , and the connection with the outer shell 23 of the battery 20 is sealed by heat compression.

[0067] As is known in the art, the term "hot pressure sealing" refers to a process in which a sealing material is brought into contact with an object to be sealed under high temperature and high pressure, and the temperature and pressure are used to cause the sealing material to undergo plastic deformation on the surface of the object to be sealed, thereby filling micro-gaps and unevenness between the sealing surfaces and achieving sealing.

[0068] The hot-pressing and sealing method can prevent the gas products of the battery from overflowing from the connection between the battery shell and the inlet and outlet components, thereby ensuring the accuracy of the detection results.

[0069] See also Figure 5 , Figure 5 Schematic cross-sectional view of an observation device according to some embodiments of the present application.

[0070] According to some embodiments of the present application, the component to be detected of the battery 20 is the electrolyte in the battery cell 21 of the battery 20 , the introduction component 30 and the output component 40 include optical fibers, and the first object and the second object include optical signals.

[0071] In some embodiments, the optical fiber may be a Raman optical fiber. During detection, an FC or SC type optical fiber connector is usually used for connection, and the end of the optical fiber is directly contacted to the surface of the detection object to ensure sufficient contact between the optical fiber and the sample surface to maximize the transmission of Raman scattering signals.

[0072] By combining the optical fiber with the shell of the observation device, rapid qualitative and quantitative detection of changes in electrolyte composition during battery charging and discharging can be achieved.

[0073] According to some embodiments of the present application, the introduction member 30 and the outlet member 40 are connected to each other within the battery cell 21 of the battery 20 .

[0074] By connecting the optical fibers of the lead-in component and the lead-out component to each other inside the battery cell of the battery, the normal interaction between the electrolyte and the spectral optical fiber is ensured, thereby ensuring the signal transmission efficiency.

[0075] According to some embodiments of the present application, the observation device 100 further includes an optical fiber sensor 50 , which is immersed in the electrolyte in the battery cell 21 of the battery 20 , and the introduction component 30 and the outlet component 40 are connected via the optical fiber sensor 50 .

[0076] The term "fiber optic sensor" refers to a sensor that uses the internal reflection characteristics of the central core of an optical fiber to sense, measure and monitor various physical quantities or chemical parameters. Fiber optic sensors can be divided into many types, including but not limited to fiber grating sensors, fiber interferometer sensors, fiber Raman sensors, fiber Bragg grating sensors, etc. When an optical signal is injected into an optical fiber from one end, it will reflect back and forth between the central core and the cladding of the optical fiber and be transmitted along the optical fiber. When the optical signal encounters changes caused by physical quantities or chemical parameters, such as temperature, pressure, deformation, chemical concentration, etc., it will affect the transmission characteristics of the optical signal, such as light intensity, phase or frequency.

[0077] By immersing the fiber optic sensor in the battery's electrolyte and ensuring sufficient interaction between the electrolyte and the sensor, the fiber optic sensor can capture the light signal scattered by the electrolyte, thereby providing it to downstream data acquisition, spectrum generation and analysis software.

[0078] According to some embodiments of the present application, the surface of the optical fiber is coated with a polymer coating, and the connection between the optical fiber and the housing 23 of the battery 20 is sealed by heat compression.

[0079] In some embodiments, the polymer coating can be used for thermal packaging of the battery, and melts and bonds with the packaging material in the heat-sealing layer of the housing 23 to achieve sealing at the optical fiber position. The material of the polymer coating can include polypropylene (PP) and polyethylene (PE).

[0080] The hot-pressing sealing method can prevent the electrolyte from overflowing from the connection between the optical fiber and the battery casing, thereby ensuring the accuracy of the test results.

[0081] According to some embodiments of the present application, the first through hole 121 and the second through hole 122 are provided with internal threads, and the introduction member 30 and the outlet member 40 are threadedly connected to the first through hole 121 and the second through hole 122 respectively.

[0082] In some embodiments, the threaded connection may include connection via a quick-connect air pipe connector or the like.

[0083] By providing the first through hole and the second through hole with internal threads so that the import component and the export component can be threadedly connected thereto, the reliability and safety of the system can be increased and the connection and disassembly of the observation device can be simple and convenient, thereby improving the maintainability of the system. In addition, the threaded connection method can also reduce the space occupied.

[0084] According to some embodiments of the present application, a seal 60 is provided at the connection between the introduction member 30 and the outlet member 40 and the housing 10 , and a locking member 70 is passed through the seal 60 to fix the seal 60 .

[0085] In some embodiments, the sealing member may include but is not limited to an O-ring, a sealing gasket, etc., and the locking member may include but is not limited to a locking device such as a nut.

[0086] By arranging the shell body as an upper shell body and a lower shell body, it is more convenient to repair and replace, and the stability of the overall structure is improved, thereby improving the convenience of designing and using the observation device.

[0087] According to some embodiments of the present application, the housing 10 includes an upper housing 11 and a lower housing 12. The observation window 112 is disposed on the upper housing 11, and the first through hole 121 and the second through hole 122 are disposed on the lower housing 12.

[0088] In some embodiments, two upper and lower shells are provided, and different sealing methods can be used to improve the sealing performance of the entire device. For example, an O-ring or a sealing strip can be used between the upper shell and the lower shell to ensure that the internal components are dustproof, waterproof, and anti-oxidation.

[0089] By arranging the shell body as an upper shell body and a lower shell body, it is more convenient to repair and replace, and the stability of the overall structure is improved, thereby improving the convenience of designing and using the observation device.

[0090] The embodiment of the present application provides an observation system 1000 for a battery, including the observation device 100 as described in the above embodiment.

[0091] Such an observation system can provide the advantages described above with respect to the observation device, which will not be described in detail for the sake of brevity.

[0092] See also Figure 6 , Figure 6 This is a schematic diagram of the structure of an observation system according to some embodiments of the present application.

[0093] According to some embodiments of the present application, the observation system 1000 further includes a box body 200, a display system 300, a battery testing system 400, an introduction system 500, and a detection system 600. The box body 200 has an internal cavity and accommodates the observation device 100, the display system 300 is arranged above the observation window 112, and is used to display the state of the battery 20 through the observation window 112. The battery testing system 400 is respectively connected to the positive and negative electrodes of the battery 20, and is used to control the working process of the battery 20, the introduction system 500 is used to introduce the first object into the observation device 100, and the detection system 600 is used to receive the second object exported from the observation device 100 and detect the second object.

[0094] In some embodiments, the "display system" may include but is not limited to an optical microscope, and in other embodiments, may include other optical imaging systems capable of realizing display functions. In some embodiments, the optical microscope may use lenses and optical elements to focus the light emitted or transmitted by the sample onto a target plane to form an enlarged, clear image, and observe and study the microstructure and details of the battery.

[0095] In some embodiments, the battery testing system 400 is connected to the positive and negative electrodes of the battery 20 respectively, and can control the charge and discharge cycle of the battery.

[0096] By combining the observation device of the embodiment of the present disclosure with an external display device and a detection device, it is possible to observe the in-situ reaction of the battery and perform online detection of the gas product or electrolyte composition. At the same time, the battery working process can be controlled, thereby obtaining the quantitative and qualitative relationship between the changes in the gas product or electrolyte and the battery working variables.

[0097] See also Figure 7 , Figure 7 This is a schematic diagram of the structure of an observation system according to some embodiments of the present application.

[0098] According to some embodiments of the present application, the component to be detected of the battery 20 is a gas product generated by the battery 20 during the charging and discharging process. The introduction system 500 includes a gas carrier device 501 and a flow meter 502. The introduction system 500 is connected to the introduction component 30 via a gas duct connector. The detection system 600 includes a cold hydrazine 601, a filter 602 and a mass spectrometer 603 connected in series in the gas flow direction.

[0099] In some embodiments, the carrier gas device 501 can be used to provide the carrier gas in the gas supply system, and an inert gas such as nitrogen or argon can be input into the observation device 100 to help stabilize the sample environment and promote the transmission and collection of gas products. The flow meter 502 is used to measure and regulate the flow of the gas, which can monitor the flow of the carrier gas and ensure that the right gas is delivered to the appropriate position during the reaction. The cold hydrazine 601 may include a compound used near the entrance of the mass spectrometer, and its main function is to cool the gas and help remove moisture and other impurities therein to protect the ion source and other sensitive components of the mass spectrometer. The filter is used to remove solid or liquid particles in the gas to prevent it from entering equipment such as a mass spectrometer. The filter 602 usually uses a microporous filter membrane or other filter material to filter out visible impurities and provide a clean gas supply. The mass spectrometer 603 is used to analyze the mass spectrum of the gas product, which can ionize the gas molecules and detect and identify the gas product according to its mass-to-charge ratio. By analyzing the mass spectrum, the type and relative content of the reaction product can be determined.

[0100] Through the external carrier gas device and flow meter, the flow rate of the introduced gas can be controlled, and the gas product can be exported to the downstream data acquisition, spectrum generation and analysis software for detection.

[0101] According to some embodiments of the present application, the component to be detected of the battery 20 is the electrolyte in the battery cell 21 of the battery 20 , the introduction system 500 includes a light stimulator 503 , and the detection system 600 includes a light receiver 604 and a computer 605 .

[0102] In some embodiments, the light exciter 503 is used to provide an excitation light source, which can usually emit a monochromatic excitation light beam to excite the sample to undergo Raman scattering. The wavelength of the excitation light can be selected as needed, and can be visible light or near-infrared light. The light receiver 604 is used to receive and detect the Raman light signal generated by the electrolyte being tested, which can capture and record the Raman scattering spectrum of the sample, which contains the vibration and structural information of the sample molecules. The light receiver 604 may include a photodiode, a photomultiplier tube or other spectral detector for converting the light signal into an electrical signal and performing signal amplification and processing. The computer 605 can perform the important role of data acquisition, processing and analysis. By connecting to the light receiver 604 and other control devices, the Raman spectrum data can be recorded and displayed in real time, and data processing, spectrum analysis, peak recognition and other operations can be performed. In addition, the computer 605 can also be connected to a database for comparison and identification of the features of the object being tested, as well as for data storage and management.

[0103] The components in the electrolyte are excited by the light exciter 503 , and the light receiver 604 receives the reflected or transmitted light signal, which is processed and analyzed by the computer 605 , thereby achieving real-time detection of the electrolyte components in the battery cell 21 of the battery 20 .

[0104] As a feasible implementation, an observation device 100 for a battery is provided, see Figures 1 to 3 The observation device 1000 includes a housing 10, an introduction member 30, and an output member 40. The housing 10 is used to accommodate the battery 20. The top wall of the housing 10 is provided with an observation window 112 for observing the state of the battery 20. The housing 10 is provided with a first through hole 121 and a second through hole 122. The introduction member 30 introduces a first object into the housing 10 via the first through hole 121, and the output member 40 outputs a second object from the housing 10 via the second through hole 122.

[0105] As a feasible implementation manner, an observation system 1000 for a battery is provided, comprising the observation device 100 as described in the above embodiment.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An observation device (100) for a battery, characterized in that: include: A housing (10) for accommodating a battery (20); a top wall of the housing (10) is provided with an observation window (112) for observing the state of the battery (20); and a first through hole (121) and a second through hole (122) are provided on the housing (10); an introduction member (30), the introduction member (30) introducing a first object into the interior of the housing (10) via the first through hole (121); as well as A guide member (40) is provided, wherein the guide member (40) guides a second object out of the interior of the housing (10) via the second through hole (122).

2. The observation device (100) according to claim 1, characterized in that: The component to be detected of the battery (20) is a gas product generated during the charging and discharging process of the battery (20), the introduction component (30) and the outlet component (40) include a gas conduit, the first object includes an inert gas, and the second object includes the gas product.

3. The observation device (100) according to claim 2, characterized in that: The introduction member (30) and the outlet member (40) extend into the housing (23) of the battery (20), or The introduction member (30) and the discharge member (40) extend into the housing (10) and do not extend into the outer shell (23) of the battery (20).

4. The observation device (100) according to claim 2, characterized in that: The introduction member (30) and the outlet member (40) extend into the outer shell (23) of the battery (20), and the connection points with the outer shell (23) of the battery (20) are sealed by heat compression.

5. The observation device (100) according to claim 1, characterized in that: The component to be detected of the battery (20) is the electrolyte in the battery core (21) of the battery (20), the introduction component (30) and the output component (40) include optical fibers, and the first object and the second object include optical signals.

6. The observation device (100) according to claim 5, characterized in that The introduction member (30) and the discharge member (40) are connected to each other in the battery cell (21) of the battery (20).

7. The observation device (100) according to claim 6, characterized in that The observation device (100) further comprises an optical fiber sensor (50), the optical fiber sensor (50) being immersed in the electrolyte in the battery core (21) of the battery (20), and the introduction member (30) and the output member (40) being connected via the optical fiber sensor (50).

8. The observation device (100) according to any one of claims 5 to 7, characterized in that: The surface of the optical fiber is coated with a polymer coating, and the connection between the optical fiber and the housing (23) of the battery (20) is sealed by heat compression.

9. The observation device (100) according to any one of claims 1 to 7, characterized in that: The first through hole (121) and the second through hole (122) are provided with internal threads, and the introduction member (30) and the outlet member (40) are respectively threadedly connected to the first through hole (121) and the second through hole (122).

10. The observation device (100) according to claim 9, characterized in that A sealing member (60) is provided at the connection between the introduction member (30) and the outlet member (40) and the housing (10), and a locking member (70) is passed through the sealing member (60) to fix the sealing member (60).

11. The observation device (100) according to any one of claims 1 to 7, characterized in that: The housing (10) comprises: an upper housing (11), the observation window (112) being arranged on the upper housing (11); and A lower shell (12), wherein the first through hole (121) and the second through hole (122) are arranged on the lower shell (12).

12. An observation system (1000) for a battery, characterized in that: It comprises an observation device (100) as claimed in any one of claims 1 to 11.

13. The observation system (1000) according to claim 12, characterized in that Further including: A box body (200), the box body (200) having an internal cavity and accommodating the observation device (100); A display system (300) is arranged above the observation window (112) and is used to display the state of the battery (20) through the observation window (112); A battery testing system (400) is respectively connected to the positive electrode (221) and the negative electrode (222) of the battery (20) and is used to control the working process of the battery (20); an introduction system (500) for introducing the first object into the observation device (100); as well as A detection system (600) is used to receive a second object derived from the observation device (100) and detect the second object.

14. The observation system (1000) according to claim 13, characterized in that The component to be detected of the battery (20) is a gas product generated by the battery (20) during the charge and discharge process. The introduction system (500) includes a gas carrier device (501) and a flow meter (502). The introduction system (500) is connected to the introduction component (30) via a gas conduit joint. The detection system (600) includes a cold hydrazine (601), a filter (602) and a mass spectrometer (603) which are sequentially connected in series in the gas flow direction.

15. The observation system (1000) according to claim 13, characterized in that The component to be detected of the battery (20) is the electrolyte in the battery core (21) of the battery (20), the introduction system (500) includes a light stimulator (503), and the detection system (600) includes a light receiver (604) and a computer (605).

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